. >>> one month after the massacre, sandy hook elementary school in connecticut, president obama moving to tighten gun control laws, and yesterday he signed 23 executive actions that don't need congressional approval, but he wants congress to ban military is style assault weapons and include background checks on all gun buyers. >> if there is even one thing to do to reduce gun violence, even one life that can be saved, then we've got an obligation to try. >> congress so far appears luke warm on proposals to tighten gun control laws and support among americans has dropped slightly. a new poll shows 56% report a ban on semi auto plattic assault weapons, down from 62% in december. >>> president obama expected to name his close aide, dennis mcdonough as new chief of staff. he will replace jack lew, who was nominated to be new treasury secretary. >>> check your flights. winter storm warnings in effect today from mississippi to washington, d.c. places you don't normally hear. meteorologist jennifer delgado looks at that. >> we're tracking snow out there. most of us dealing with rain we have t